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Analog Devices Inc. ADP1109AR-5-REEL
- Part No.:
- ADP1109AR-5-REEL
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1109AR-5-REEL.pdf
- Description:
- IC REG BOOST 5V 1.2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
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Product details
Overview
ADP1109AR-5-REEL from Analog Devices is a micropower step-up DC-to-DC converter in SO-8 package, delivering 100 mA at 5 V from a 3 V input, featuring 120 kHz fixed-frequency gated oscillator, logic-controlled shutdown, and 1.25 V internal reference for precise output regulation. It serves as a compact, low-component-count boost regulator in battery-powered portable electronics.
For engineers reviewing the ADP1109AR-5-REEL datasheet, ADP1109AR-5-REEL pinout, ADP1109AR-5-REEL application, or ADP1109AR-5-REEL equivalent, key selection criteria include input voltage range (2 V to 9 V), quiescent current (450–590 µA), switch saturation voltage (0.4–0.8 V), output ripple (20–50 mV), and SO-8 thermal and layout compatibility.
Technical Context
The ADP1109AR-5-REEL implements a gated-oscillator topology with an internal 1.25 V reference and comparator-based feedback control, eliminating need for external frequency compensation. Its 120 kHz switching frequency enables use of small surface-mount inductors and capacitors while maintaining stable regulation under varying load and input conditions.
It integrates a bipolar power switch with 1.2 A peak current capability and 0.4–0.8 V saturation voltage, supporting fixed 5 V output via internal laser-trimmed resistor network connected to FB/SENSE pin. Shutdown functionality reduces quiescent current to 450 µA when SHUTDOWN pin is driven low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00 V ±2.5% (4.75–5.25 V) across 3–5 V input range - ensures stable logic supply for microcontrollers and sensors. |
| Oscillator Frequency | 120 kHz typical (90–155 kHz over temp/voltage) - balances EMI control and component size for portable designs. |
| Quiescent Current | 450–590 µA (switch off) - enables multi-year battery life in low-duty-cycle applications like pagers and inventory scanners. |
| Input Voltage Range | 2 V to 9 V - supports single-cell Li-ion (2.7–4.2 V), NiMH (1.2 V × 2–3), or regulated 3.3/5 V rails. |
| Switch Saturation Voltage | 0.4–0.8 V at 500 mA - limits conduction loss and thermal rise in compact SO-8 package. |
| Output Ripple | 20–50 mV peak-to-peak - meets noise requirements for analog front-ends and flash memory VPP generation. |
| Duty Cycle | 40–70% at full load - accommodates wide VIN-to-VOUT ratios without requiring external duty cycle limiting. |
Pinout & Package
ADP1109AR-5-REEL is housed in an 8-lead SOIC (SO-8) package with standard 1.27 mm pitch, 4.90 × 6.00 mm body, and exposed pad not present. Pin 1 is marked by notch or dot; pins 2, 5, and 6 are internally unconnected (NC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply connection | Accepts 2–9 V DC; must be decoupled locally to suppress switching transients. |
| NC (Pins 2, 5, 6) | No internal connection | Must remain unconnected; no routing or grounding required. |
| SW (Pin 3) | Collector of internal NPN switch | Drives external inductor; carries high di/dt - requires short, low-inductance PCB trace. |
| GND (Pin 4) | Power and signal ground reference | Primary return path for switch current and feedback; must connect to low-impedance ground plane. |
| FB/SENSE (Pin 5) | Feedback input for output regulation | Internally tied to 5 V divider; connect directly to regulated 5 V output for fixed-voltage operation. |
| SHUTDOWN (Pin 6) | Logic enable/disable control | Drives low (≤0.8 V) to disable oscillator; draws ≤20 µA - compatible with CMOS/LVTTL outputs. |
| NC (Pin 7) | No internal connection | Unconnected; do not route or terminate. |
| GND (Pin 8) | Secondary ground terminal | Provides additional ground path; tie to same ground plane as Pin 4 for optimal noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 450 µA quiescent current in shutdown - extends battery runtime in intermittent-use devices. |
| Fixed 5 V output | Laser-trimmed internal resistor network sets precise 5.00 V output - eliminates external feedback components. |
| Gated-oscillator architecture | 120 kHz switching only during regulation - avoids continuous switching losses and simplifies EMI filtering. |
| Integrated bipolar power switch | 1.2 A peak current rating with 0.4–0.8 V VCE(SAT) - enables compact design without external transistor or driver. |
| Logic-compatible shutdown | VIH ≥ 2.0 V, VIL ≤ 0.8 V - interfaces directly with microcontroller GPIOs without level-shifting. |
Applications
| Cellular Telephones | Laptop and Palmtop Computers |
|---|---|
|
Use Scenario: Boosting single-cell Li-ion (3.0–4.2 V) to stable 5 V for USB peripherals or camera modules. IC Role / Device Role / Timing Role: Primary step-up regulator supplying 100 mA at 5 V with <50 mV ripple. Use Value: Enables direct integration of 5 V accessories without separate charge-pump ICs or larger inductors. |
Use Scenario: Generating 5 V rail from 3.3 V system bus to power legacy I/O or card readers. IC Role / Device Role / Timing Role: Auxiliary boost converter with logic shutdown synchronized to system sleep states. Use Value: Reduces standby power by >50% versus always-on regulators, extending unplugged operation time. |
| Pagers | Portable Instruments |
|
Use Scenario: Converting 2.4 V NiMH battery stack to 5 V for RF transmitter bias and display backlight. IC Role / Device Role / Timing Role: Low-quiescent-current boost stage operating intermittently during message receive bursts. Use Value: Achieves >3-year battery life on two AA cells due to 450 µA shutdown current and gated switching. |
Use Scenario: Powering precision ADC reference or op-amp rails from variable battery input (2–5 V). IC Role / Device Role / Timing Role: Clean, low-noise 5 V source with <50 mV ripple and minimal conducted EMI. Use Value: Maintains 12-bit+ measurement accuracy without adding post-regulation LDO overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up DC-to-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Charge-pump topology; no inductor required; 5 V output; 100 mA max; 120 kHz switching; 125 µA quiescent current. | Lower EMI and smaller footprint but limited to 2×VIN input; unsuitable for 2 V → 5 V conversion. | Select MAX680ESA+ when input ≥2.5 V and board space is constrained; avoid for sub-2.5 V battery start-up. |
| TPS61022DSQR | Synchronous boost; 5 V output; 2 A switch; 2.5–5.5 V input; 400 kHz switching; 20 µA quiescent current. | Higher efficiency (>90%) and current capability but requires external MOSFETs and more complex layout. | Choose TPS61022DSQR for high-efficiency, high-current designs where SO-8 footprint is secondary to performance. |
Compared with MAX680ESA+ and TPS61022DSQR, ADP1109AR-5-REEL offers best-in-class trade-off between ultra-low shutdown current (450 µA), fixed 5 V accuracy, and minimal BOM count (only inductor, diode, capacitor, and optional input cap), making it ideal for cost-sensitive, long-life portable systems with moderate current needs.
Availability
ADP1109AR-5-REEL is available at Aetrix Electronics and suitable for cellular telephones, portable instruments, pagers, and laptop auxiliary power supplies requiring stable component supply, consistent SO-8 packaging, and long-term production continuity.
Supply support for ADP1109AR-5-REEL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets since 1965.
The ADP1109 series was designed specifically for micropower, low-component-count boost conversion in portable battery-operated equipment, emphasizing quiescent current optimization and ease of implementation over high-efficiency or wide-input flexibility.
FAQ
What is the maximum output current supported by ADP1109AR-5-REEL?
The ADP1109AR-5-REEL delivers up to 100 mA at 5 V when supplied from a 3 V input, as specified in the Typical Application section. Output current decreases at lower input voltages (e.g., 50 mA at 2 V input) due to duty cycle and switch limitations. Exceeding 100 mA risks thermal overload or regulation loss, especially in SO-8 package without heatsinking.
Can ADP1109AR-5-REEL operate from a 2 V input?
Yes, ADP1109AR-5-REEL supports input voltages as low as 2 V, enabling use with deeply discharged NiMH or single-cell Li-ion batteries. At 2 V input, it delivers ~50 mA at 5 V output per Figure 3. Operation below 2 V is outside Absolute Maximum Ratings and may cause failure or undefined behavior.
What external components are required for basic operation of ADP1109AR-5-REEL?
Four external components are required: an inductor (e.g., 15 µH), Schottky diode (e.g., 1N5818), output capacitor (e.g., 22 µF/16 V low-ESR tantalum), and optional input capacitor (e.g., 10 µF). No feedback resistors are needed - the ADP1109AR-5-REEL uses internal laser-trimmed resistors for fixed 5 V output.
How does the shutdown function work on ADP1109AR-5-REEL?
The SHUTDOWN pin (Pin 6) disables the internal oscillator when pulled low (≤0.8 V), reducing quiescent current to 450 µA. The output drops to near-zero, and the internal switch remains off. When pulled high (≥2.0 V), normal regulation resumes within one switching cycle. No external pull-up is required if driven actively.
Is ADP1109AR-5-REEL RoHS compliant and lead-free?
Yes, ADP1109AR-5-REEL is RoHS compliant and lead-free, per Analog Devices' product change notices and packaging specifications for SO-8 devices manufactured after 2006. The "-REEL" suffix indicates tape-and-reel packaging conforming to EIA-481 standards for automated assembly.
ADP1109AR-5-REEL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 9V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.2A (Switch)
- Frequency - Switching:
- 120kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADP1109AR-5-REEL FAQ
1.How can I place an order for ADP1109AR-5-REEL through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1109AR-5-REEL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ADP1109AR-5-REEL reliable?
The price and inventory of ADP1109AR-5-REEL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1109AR-5-REEL is usually 5 days.
3.What payment methods are accepted for ADP1109AR-5-REEL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1109AR-5-REEL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1109AR-5-REEL?
ADP1109AR-5-REEL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1109AR-5-REEL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ADP1109AR-5-REEL?
For technical support, including ADP1109AR-5-REEL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1109AR-5-REEL requirements.
6.How does Aetrix verify that ADP1109AR-5-REEL is sourced from the original manufacturer or authorized distributors?
All ADP1109AR-5-REEL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ADP1109AR-5-REEL meets industry standards.
7.What is the process for return or replacement of ADP1109AR-5-REEL?
All ADP1109AR-5-REEL units undergo pre-shipment inspection (PSI). If there is an issue with ADP1109AR-5-REEL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ADP1109AR-5-REEL part is unused and in its original packaging.
Return procedure for ADP1109AR-5-REEL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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